merge in watterso_setup_automated_testing

added .idea to .gitignore for pycharm
pulled tests out of run.py, created adsb_test, ehs_test, and util test
moved the rest of runp.py into decode_test_data
changed imports and __init__ file so it doesn't contain magic

tests/util_test.py

@@ -0,0 +1,15 @@
+from pyModeS import util
+
+
+def test_hex2bin():
+    assert util.hex2bin('6E406B') == "011011100100000001101011"
+
+
+def test_crc_decode():
+    checksum = util.crc("8D406B902015A678D4D220AA4BDA")
+    assert checksum == "000000000000000000000000"
+
+
+def test_crc_encode():
+    parity = util.crc("8D406B902015A678D4D220AA4BDA", encode=True)
+    assert util.hex2bin("AA4BDA") == parity